厚轮缘盘形件多工步旋压增厚成形工艺

Forming process of disc-like part with thick rim by multi-step spinning thickening

针对厚轮缘盘形件设计了多工步旋压工艺及每一步的旋轮尺寸。通过有限元模拟，分析了旋压增厚工艺的成形过程，试验验证了模拟结果。分析了旋轮圆角半径R和上倾角“对成形的影响规律，设计了5工步旋压增厚成形方案。研究结果表明，直径螂26mm，厚度3mm的圆形板坯，经过5个工步，可以成形为轮缘厚度为9．1mm，宽度为7．8mm的盘形件。成形过程中，第l、2、3步可以分为3个阶段，第4、5步可分为2个阶段。每一工步最大的旋压力为80-120kN，与试验值之间的误差小于7％。最后，研究了成形件横截面的硬度分布规律，探讨了硬度分布的原因。

A multi-step spinning process and the wheel dimension of each step were designed for disc-like part with thick rim. Through FE simulation, the spinning thickening process was analyzed and the result was validated by experiment. The influence of the fillet radius R and the uplift angle α on the forming process was analyzed, and a five-step spinning thickening forming scheme was set up. The results show that after five steps, a circular slab with diameter of Ф326 mm and thickness of 3 mm can be formed into a disc-like part with rim thickness of 9. 1 mm and width of 7.8 mm. In the forming process, the 1st, 2nd, 3rd steps can be divided into three stages, and the 4th and 5th steps can be divided into two stages. The maximum spinning forming force of each step is 80 - 120 kN, and the error between simulation result and experimental value is less than 7%. Finally, the hardness distribution of the formed part was analyzed, and the cause of hardness distribution was discussed.